Preparation method of medical absorbent cotton trousers type medical pad

Abstract

The invention provides a preparation method of a pair of medical absorbent cotton trousers type medical pads, and relates to the technical field of medical absorbent cotton. The preparation method provided by the invention comprises the following steps: carding cotton fibers subjected to impurity removal to prepare cotton linters; degreasing the cotton linters in alkali liquor, and bleaching to obtain degreased cotton; performing surface activation treatment on the degreasing cotton to obtain active cotton; immersing active cotton in a polyphenol solution for adsorption to prepare primary modified cotton; soaking the primary modified cotton in a silver ion solution, separating and drying to obtain modified absorbent cotton; and cutting and shaping the modified absorbent cotton to obtain the medical absorbent cotton pants-type medical pad. According to the medical pad, the degreasing cotton can be subjected to surface modification treatment, so that the performance stability can be improved, and the performance consistency of the medical pad in the using and pressing processes can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of medical absorbent cotton, in particular to a preparation method of a medical absorbent cotton trouser-type medical pad. Background Art

[0002] Medical absorbent cotton pants are trouser-type medical products made of medical absorbent cotton as the main component, which can provide protection and continuous protection for patients' postoperative care, elderly care and long-term bedridden patient care. When sewing medical absorbent cotton pants, high-quality medical absorbent cotton needs to be selected to ensure that the overall cotton pants have good water absorption, breathability and hypoallergenic properties. After the absorbent cotton is cut into trouser-type styles according to ergonomics, the absorbent cotton is double-sidedly sewn with non-woven fabric, and finally disinfected and packaged. Therefore, absorbent cotton is the most critical and important raw material, and its performance directly affects the performance of the absorbent cotton pants.

[0003] The prior art provides a graphene medical cotton, which is prepared by cotton loose fibers, graphene, nanosilver and a Chinese medicine composition extract, wherein the Chinese medicine composition extract is prepared by mixing chia seeds, bitter herbs and flat buds and then extracting and concentrating them. The preparation method of the graphene medical cotton comprises the following steps: alkali washing, enzyme boiling and water washing the cotton loose fibers, then immersing them in the Chinese medicine composition extract at a constant temperature, adding a silver ion mixture and continuing to immerse them, freeze-drying them, mixing the freeze-dried cotton loose fibers with graphene, and making the graphene medical cotton after blending, cleaning, combing and laying.

[0004] The prior art also provides a method for preparing medical absorbent cotton modified with graphene oxide, which comprises wrapping cotton fibers with large sheets of graphene oxide, filling gaps with medium sheets of graphene oxide, mixing in an alkaline Tris solution, freeze-drying, and sterilizing to obtain medical absorbent cotton modified with graphene oxide. The prior art also provides an absorbent cotton gauze containing nanosilver and chitosan, wherein chitosan is combined with the medical absorbent cotton gauze by soaking and freeze-drying, and nanosilver is adsorbed on the gauze by the interaction between nanosilver particles and chitosan amino groups.

[0005] However, when mixing the freeze-dried cotton loose fibers with graphene, it is difficult to evenly mix the graphene and cotton fibers, which greatly affects the performance consistency of the medical surface during use, and the bonding performance between graphene and cotton fibers is difficult to ensure. The use of graphene oxide, nanosilver, and chitosan to modify cotton fibers also makes it difficult to ensure the uniform filling of graphene oxide nanosilver and chitosan. In addition, it is easy to fall off during long-term use, resulting in poor performance and stability. Therefore, it is urgent to provide a solution to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide a method for preparing a medical absorbent cotton pants-type medical pad.

[0007] The present invention provides a method for preparing a medical absorbent cotton pants-type medical pad, comprising the following steps:

[0008] The cotton fibers after impurities removal are carded to obtain cotton linters;

[0009] The cotton linters are degreased in alkali solution and then bleached to obtain absorbent cotton;

[0010] Activated cotton is prepared by surface activation treatment of absorbent cotton;

[0011] The active cotton is immersed in a polyphenol solution for adsorption to obtain primary modified cotton;

[0012] The primary modified cotton is soaked in a silver ion solution, separated and dried to obtain the modified absorbent cotton;

[0013] The modified absorbent cotton is cut and shaped to obtain a medical absorbent cotton pants-shaped medical pad.

[0014] The preparation method provided by the present invention can remove impurities in the cotton fibers after impurities are removed and the fibers are combed to make them more uniform and neat, which can greatly improve the purity and fiber uniformity of the cotton fibers. The cotton linters are degreased and bleached to remove natural oils, waxes and pigments in the cotton fibers, and fatty acid salts and glycerol are removed from the fiber surface by saponification reaction, thereby further improving the purity and hydrophilicity of the fibers. Bleaching can also improve the whiteness and chemical adsorption performance of the cotton fibers. The surface activation of the absorbent cotton can introduce active groups on the fiber surface, thereby improving the reactivity and molecular adsorption capacity of the cotton fibers, thereby improving the adsorption capacity of polyphenols. The polyphenols are combined with the active groups on the surface of the cotton fibers through hydrogen bonds and electrostatic adsorption, and the polyphenols can form a uniform coating structure on the surface of the cotton fibers, which can not only improve the antibacterial performance, but also improve the binding capacity with silver ions, and promote the spectral antibacterial capacity of the silver ions, thereby further improving the antibacterial performance. In addition, the polyphenols can also improve the binding performance of silver ions in the cotton fibers, thereby preventing the silver ions from falling off during use.

[0015] Optionally, the process of performing surface activation treatment on absorbent cotton to obtain activated cotton includes:

[0016] Pre-wet the cotton wool in the ethanol solution;

[0017] The pre-moistened absorbent cotton is reacted in a succinyl chloride solution and then separated and dried to obtain acylated cotton;

[0018] The acylated cotton is reacted in an ion solution and then separated and dried to obtain the active cotton.

[0019] By adopting the above technical scheme, the absorbent cotton is modified in succinyl chloride, and carboxyl groups are introduced into the cellulose molecules of the absorbent cotton. In addition, succinyl chloride can also react with hydroxyl groups on cellulose to form ester bonds, which can greatly improve the polarity and reactivity of cotton fibers. In addition, carboxyl groups can also interact with polar groups in polyphenols, thereby improving the positional stability and adsorption capacity of polyphenol molecules on cotton fibers. After the immersion reaction in the ionic liquid, cations and anions in the ionic liquid are attached to the surface of the cotton fibers, which can greatly increase the loading amount of polyphenols and promote the formation of a multi-layer adsorption structure of polyphenols on the surface of the cotton fibers.

[0020] Optionally, the mass fraction of succinyl chloride in the succinyl chloride solution is 1-5%.

[0021] Optionally, the solvent of the succinyl chloride solution includes at least one of carbon tetrachloride, toluene, ethyl acetate, diethyl ether and n-hexane.

[0022] Optionally, the mass ratio of the absorbent cotton to the succinyl chloride in the succinyl chloride solution is 10:(0.5-0.8).

[0023] Alternatively, after pre-moistened absorbent cotton is immersed in the succinyl chloride solution, ultrasonic reaction is carried out at 40-60° C. for 15-20 min.

[0024] Optionally, the absorbent cotton after the reaction is taken out and washed with deionized water until the washing liquid is neutral, and then dried at 50-60° C. to obtain the acylated cotton.

[0025] Optionally, in the process of separating and drying the acylated cotton after reacting it in an ionic solution to obtain active cotton, the solute in the ionic solution includes at least one of 1-ethyl-3-methylimidazolium chloride, 1-hexyl-3-methylimidazolium chloride, 1-octyl-3-methylimidazolium chloride, 1-butyl-3-methylimidazolium chloride, and 1-benzyl-3-methylimidazolium chloride.

[0026] Optionally, in the process of separating and drying the acylated cotton after reacting it with the ionic solution to obtain the active cotton, the molar concentration of the solute in the ionic solution is 0.1-1 mol / L.

[0027] Optionally, in the process of separating and drying the acylated cotton after reacting it in the ionic solution to obtain the active cotton, the mixing ratio of the mass of the acylated cotton to the amount of the solute substance in the ionic solution is 1: (0.05-0.06) g / mol.

[0028] Optionally, in the process of separating and drying the acylated cotton after reacting it in the ionic solution to obtain the active cotton, the acylated cotton is immersed in the ionic solution, subjected to ultrasonic reaction at 30-50° C. for 10-15 min, and then kept warm for 1-2 h.

[0029] Optionally, in the process of separating and drying the acylated cotton after the reaction in the ionic solution to obtain the active cotton, the acylated cotton after the reaction is taken out and washed with deionized water until the washing liquid is neutral, and then dried at 50-60° C. to obtain the active cotton.

[0030] Optionally, in the process of immersing the active cotton in a polyphenol solution for adsorption to obtain the primary modified cotton, the solute in the polyphenol solution includes at least one of tea polyphenols, anthocyanins, curcumin, resveratrol, and quercetin.

[0031] Optionally, in the process of immersing the active cotton in a polyphenol solution for adsorption to obtain primary modified cotton, the mass fraction of the solute in the polyphenol solution is 1-10%.

[0032] Optionally, in the process of immersing the active cotton in the polyphenol solution for adsorption to obtain the primary modified cotton, the mass ratio of the active cotton to the solute in the polyphenol solution is 1:(3-5).

[0033] Optionally, in the process of immersing the active cotton in a polyphenol solution for adsorption to obtain primary modified cotton, the active cotton is immersed in the polyphenol solution and stirred for reaction at 30-50° C. for 3-5 hours.

[0034] Optionally, in the process of immersing the active cotton in the polyphenol solution for adsorption to obtain the primary modified cotton, the active cotton after adsorption is taken out, squeezed and dried at 30-40° C. to obtain the primary modified cotton.

[0035] Optionally, in the process of preparing modified absorbent cotton by soaking primary modified cotton in a silver ion solution and then separating and drying, the solute of the silver ion solution includes silver nitrate.

[0036] Optionally, in the process of preparing modified absorbent cotton by soaking primary modified cotton in a silver ion solution and then separating and drying, the molar concentration of the solute in the silver ion solution is 0.1-0.5 mol / L.

[0037] Optionally, in the process of soaking the primary modified cotton in a silver ion solution and then separating and drying to obtain modified absorbent cotton, after soaking the primary modified cotton in the silver ion solution, nitrogen is introduced into the silver ion solution at a rate of 1 L / min for 1-2 h at 30-40°C.

[0038] Optionally, in the process of soaking the primary modified cotton in a silver ion solution and then separating and drying to obtain the modified absorbent cotton, the primary modified cotton after the soaking reaction is taken out and dried at 60-70° C. to obtain the modified absorbent cotton.

[0039] Optionally, in the process of degreasing cotton linters in an alkali solution and then bleaching them to obtain absorbent cotton, the cotton linters are stirred and reacted in an alkali solution at 50-80° C. for 0.5-2 h for degreasing.

[0040] Optionally, in the process of degreasing cotton linters in an alkali solution and then bleaching them to obtain absorbent cotton, the alkali solution includes at least one of a sodium hydroxide solution and a potassium hydroxide solution.

[0041] Optionally, in the process of degreasing cotton linters in an alkali solution and then bleaching them to obtain absorbent cotton, the mass fraction of the solute in the alkali solution is 5-10%.

[0042] Optionally, in the process of degreasing cotton linters in an alkali solution and then bleaching them to obtain absorbent cotton, the degreased cotton linters are rinsed with deionized water until the washing liquid becomes neutral.

[0043] Optionally, in the process of degreasing cotton linters in an alkaline solution and then bleaching them to obtain absorbent cotton, the degreased cotton linters are immersed in a bleaching solution for bleaching to obtain the absorbent cotton, and the bleaching solution includes at least one of hydrogen peroxide and sodium hypochlorite. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be the common meanings understood by people with general skills in the field to which the present invention belongs.

[0045] The embodiment of the present invention provides a method for preparing a medical absorbent cotton pants-type medical pad, comprising the following steps:

[0046] S1, carding the cotton fibers after impurity removal to obtain cotton linters;

[0047] S2, degreasing cotton linters in alkali solution and then bleaching to obtain absorbent cotton;

[0048] S3, performing surface activation treatment on the absorbent cotton to obtain active cotton;

[0049] S4, immersing the active cotton in a polyphenol solution for adsorption to obtain primary modified cotton;

[0050] S5, soaking the primary modified cotton in a silver ion solution, separating and drying the solution to obtain modified absorbent cotton;

[0051] S6. Cut and shape the modified absorbent cotton to obtain a medical absorbent cotton pants-shaped medical pad.

[0052] In fact, in the process of executing step S1, a mechanical impurity removal method can be used to remove impurities from cotton fibers. First, a cotton cleaner is used to perform preliminary processing on the cotton fibers. The beaters in the cotton cleaner rotate at high speed to hit and tear the cotton fibers, thereby separating impurities from the cotton fibers, and the dust grid is used to perform a preliminary screening of the impurities.

[0053] In fact, in the process of executing step S1, after using a cotton cleaning machine to perform preliminary screening and impurity removal on the cotton fibers, a cotton carding machine can also be used to perform secondary impurity removal and combing on the cotton fibers, which can further remove smaller impurities and short fibers in the cotton fibers, significantly improving the efficiency and cleanliness of impurity removal on the cotton fibers. In addition, the needle cloth on the cylinder in the cotton carding machine can comb and shape the cotton fibers.

[0054] Specifically, in the process of executing step S1, when using a cotton cleaner and a cotton carding machine to remove impurities and comb the cotton fibers, technical personnel in this field can adaptively and reasonably adjust the parameters of the cotton cleaner and the cotton carding machine according to the processing conditions, such as adjusting the speed of the beaters in the cotton cleaner, the dust grid spacing, and the spacing between the cylinder and the cover plate of the cotton cleaner. In addition, the parameters can also be adjusted according to the processing amount and impurity content of the cotton fibers to achieve the necessary removal of impurities and combing of the cotton fibers.

[0055] In some embodiments, during the execution of step S2, the cotton linters are soaked in an alkali solution so that the alkali reacts with the oil in the cotton linters to undergo a saponification reaction, thereby converting the water-insoluble oil into a water-soluble fatty acid salt, thereby degreasing the cotton linters. Specifically, the alkali solution used includes at least one of a sodium hydroxide solution and a potassium hydroxide solution, and the mass fraction of the solute in the alkali solution is 5-10%.

[0056] In some embodiments, during the execution of step S2, after the cotton linters are soaked in alkaline solution, a surfactant may be added to the alkaline solution to reduce the surface tension, thereby making it easier for the grease in the cotton linters to separate from the surface of the cotton fibers. In addition, when faced with some cotton linters with a tight texture and deep grease penetration, the degreasing efficiency and degreasing rate can be significantly improved by adding a surfactant.

[0057] In some embodiments, during the execution of step S2, the cotton linters are immersed in an alkaline solution and stirred at 50-80° C. for 0.5-2 hours for degreasing. In fact, by performing a heating process during the degreasing process, the rate of the saponification reaction can be effectively increased, and the oil components can be better decomposed, thereby increasing the degreasing rate of the cotton linters.

[0058] In fact, during the process of performing step S2, after the cotton linters are degreased in the alkali solution, the degreased cotton linters are taken out and the surface of the cotton linters is rinsed with deionized water, so that the alkali solution remaining on the surface of the cotton linters and the generated fatty acid salts can be removed. In fact, during the process of using deionized water for surface rinsing, the washing liquid is neutral, so as to ensure that the pH value of the cotton linters is restored to near neutral.

[0059] In some embodiments, during the execution of step S2, the degreased cotton linters are bleached in a bleaching solution, which helps to improve the surface whiteness of the cotton linters after degreasing, improves the safety when used in the medical and sanitary fields, and the white appearance can enhance the visual sense of neatness. The bleaching treatment can also remove impurities and dirt on the surface of the absorbent cotton, making the pores of the absorbent cotton fibers smoother and improving the adsorption capacity of the absorbent cotton.

[0060] In some embodiments, during the execution of step S2, the defatted cotton linters are stirred in the bleaching solution to react, thereby improving the bleaching efficiency and bleaching uniformity. In addition, the bleaching time is controlled to be 30-60 minutes to avoid over-bleaching of the cotton linters by the bleaching solution. In fact, during the bleaching process, the temperature of the bleaching solution can be controlled at 20-30° C. Within this temperature range, the reaction efficiency can be effectively balanced and damage to the cotton linters and over-bleaching can be avoided.

[0061] In some embodiments, during the process of executing step S2, when the degreased cotton linters are bleached in a bleaching solution, the bleaching solution used includes at least one of hydrogen peroxide and sodium hypochlorite. Specifically, the concentration of the bleaching solution can be 1-5%. Specifically, after the bleaching treatment of the cotton linters is completed using the bleaching solution, the cotton linters are rinsed with deionized water to remove the residual bleaching components and the generated decomposition products, thereby stabilizing the bleaching effect.

[0062] In some embodiments, the process of executing step S3 includes:

[0063] S3.1. Pre-wet the absorbent cotton in the ethanol solution;

[0064] S3.2, reacting the pre-moistened absorbent cotton in a succinyl chloride solution, separating and drying the cotton to obtain acylated cotton; S3.3, reacting the acylated cotton in an ionic solution, separating and drying the cotton to obtain activated cotton.

[0065] In fact, by pre-wetting the absorbent cotton with ethanol in step S3.1, the permeability of ethanol can be utilized to enter the interior of the absorbent cotton fiber, thereby facilitating the full penetration of succinyl chloride and ion solution into the absorbent cotton fiber, and facilitating the improvement of surface activation efficiency. Specifically, after pre-wetting with ethanol, the loading amount of ethanol on the absorbent cotton is 1-2 g / g.

[0066] In fact, during the execution of step S3.2, the pre-moistened cotton wool is reacted in a succinyl chloride solution. Succinyl chloride enters the interior of the cotton wool fiber through the ethanol that permeates the cotton wool, thereby introducing carboxyl groups onto the fiber surface and reacting with the hydroxyl groups on the fiber surface to form ester bonds. This not only improves the uniformity of the surface treatment of the cotton wool fiber, but also greatly improves the polarity and reactivity of the cotton wool fiber surface.

[0067] In fact, after the absorbent cotton is surface treated with succinyl chloride, the absorbent cotton's absorption performance for liquids can be significantly improved, so that when used in the medical and health fields, it can absorb wound exudate faster. In addition, the surface treatment can also improve the chemical stability and mechanical stability of the absorbent cotton, thereby improving the durability of the absorbent cotton and avoiding the breakage of the absorbent cotton when it is corroded by mechanical forces and detergents, medicines, etc., which can effectively increase its service life.

[0068] In fact, during the process of performing step S3.3, after the acylated cotton is soaked in the ionic solution for reaction, the cations and anions in the ionic liquid are attached to the surface of the cotton fiber, which can greatly increase the loading amount of polyphenols and promote the formation of a multilayer adsorption structure of polyphenols on the surface of the cotton fiber. In addition, the cations and anions in the ionic liquid can combine with the active groups of the acylated cotton fiber to form new adsorption sites.

[0069] In some embodiments, during the execution of step S3.2, the mass fraction of succinyl chloride in the succinyl chloride solution used is 1-5%. In fact, the solvent used in the succinyl chloride solution includes at least one of carbon tetrachloride, toluene, ethyl acetate, ether, and n-hexane.

[0070] Specifically, during the execution of step S3.2, the mass ratio of the absorbent cotton used to the succinyl chloride in the succinyl chloride solution is 10:(0.5-0.8), and the pre-moistened absorbent cotton is immersed in the succinyl chloride solution and then ultrasonically reacted at 40-60° C. for 15-20 minutes. In practice, the absorbent cotton after the reaction is taken out and washed with deionized water until the washing liquid is neutral, and then dried at 50-60° C. to obtain the acylated cotton.

[0071] In some embodiments, during the execution of step S3.3, the solute in the ionic solution includes at least one of 1-ethyl-3-methylimidazolium chloride, 1-hexyl-3-methylimidazolium chloride, 1-octyl-3-methylimidazolium chloride, 1-butyl-3-methylimidazolium chloride, and 1-benzyl-3-methylimidazolium chloride, and the molar concentration of the solute in the ionic solution is 0.1-1 mol / L, and the mixing ratio of the mass of the acylated cotton to the amount of the solute in the ionic solution is 1: (0.05-0.06) g / mol. The acylated cotton is immersed in the ionic solution, ultrasonically reacted at 30-50°C for 10-15min and then kept warm for 1-2h. The acylated cotton after the reaction is taken out and washed with deionized water until the washing solution is neutral, and then dried at 50-60°C to obtain active cotton.

[0072] In some embodiments, during the execution of step S4, the solute in the polyphenol solution includes at least one of tea polyphenols, anthocyanins, curcumin, resveratrol, and quercetin; the mass fraction of the solute in the polyphenol solution is 1-10%; the mass ratio of the active cotton to the solute in the polyphenol solution is 1:(3-5); the active cotton is immersed in the polyphenol solution and stirred at 30-50°C for 3-5h; the adsorbed active cotton is taken out, squeezed, and dried at 30-40°C to obtain primary modified cotton.

[0073] In some embodiments, during the execution of step S5, the solute of the silver ion solution includes silver nitrate, and the molar concentration of the solute in the silver ion solution is 0.1-0.5 mol / L. After the primary modified cotton is soaked in the silver ion solution, nitrogen is introduced into the silver ion solution at a rate of 1L / min for 1-2h at 30-40°C, and the primary modified cotton after the soaking reaction is taken out and dried at 60-70°C to obtain modified absorbent cotton.

[0074] Preparation Example 1

[0075] This preparation example 1 provides a method for preparing absorbent cotton, comprising the following steps:

[0076] S1, feeding the cotton fibers evenly into the cotton feeding port of the cotton cleaner, setting the beater speed in the cotton cleaner to 800 rpm, the dust grid spacing to 3 mm, and the spacing between the cylinder and the cover plate to 0.18 mm, inputting the cotton fibers passing through the cotton cleaner into the carding machine, the licker-in roller in the carding machine rotates at a speed of 900 rpm, and the cylinder speed is 350 rpm, and the cotton fibers are opened and carded to obtain cotton linters;

[0077] S2. Immerse the cotton linters in a 5% by mass sodium hydroxide solution, stir and react at 60°C for 1 hour, then take out the cotton linters, and continuously rinse the cotton linters with deionized water until the pH of the rinse liquid is neutral. Then, immerse the defatted cotton linters in a 3% by mass sodium hypochlorite aqueous solution, stir and react at 25°C and bleach for 40 minutes, then take out the cotton linters, and rinse the cotton linters with deionized water to obtain absorbent cotton.

[0078] Example 1

[0079] This Example 1 provides a method for preparing a medical absorbent cotton pants-type medical pad based on the absorbent cotton prepared in Preparation Example 1, comprising the following steps:

[0080] S3. After soaking and adsorbing the absorbent cotton in a 75wt% ethanol aqueous solution, the pre-wetted absorbent cotton was soaked in a 3% mass fraction succinyl chloride (CAS: 543-20-4, the mass ratio of absorbent cotton to succinyl chloride was 10:0.6) solution (the solvent was carbon tetrachloride), and ultrasonically reacted at 50°C at a frequency of 20KHz for 15 minutes, then the absorbent cotton was taken out and rinsed with deionized water until the rinse solution was neutral, and then dried at 50°C to constant weight to obtain acylated cotton; then the acylated cotton was soaked in 1-ethyl-3-methylimidazole chloride (CAS: 65039-09-0, the mixing ratio of acylated cotton to 1-ethyl-3-methylimidazole chloride was 1g:0.07mol l) After being immersed in an ion solution (the solvent is deionized water), ultrasonically reacting at 40°C and 20KHz for 15 minutes, the ultrasonic wave is stopped and kept warm for 2 hours, the acylated cotton is taken out and rinsed with deionized water until it becomes neutral, and then dried at 50°C to constant weight to obtain active cotton;

[0081] S4, immersing the active cotton in a 5% tea polyphenol (CAS: 84650-60-2, the mass ratio of active cotton to tea polyphenol is 1:4) solution (the solvent is deionized water), stirring and reacting at 40°C for 4 hours, squeezing out the excess tea polyphenol solution, and drying at 35°C to constant weight to obtain primary modified cotton;

[0082] S5, immersing the primary modified cotton in a silver nitrate aqueous solution (silver ion concentration 0.4 mol / L), introducing nitrogen into the silver nitrate aqueous solution at a rate of 1 L / min for 1-2 h at 35° C., taking out the primary modified cotton and drying it at 65° C. to constant weight to obtain modified absorbent cotton;

[0083] S6. Cut and shape the modified absorbent cotton to obtain a medical absorbent cotton pants-shaped medical pad.

[0084] Example 2

[0085] This Example 2 provides a method for preparing a medical absorbent cotton pants-type medical pad based on the absorbent cotton prepared in Preparation Example 1, comprising the following steps:

[0086] S3. After soaking the absorbent cotton in a 75% ethanol solution for adsorption, soak the pre-wetted absorbent cotton in a 3% succinyl chloride (CAS: 543-20-4, the mass ratio of absorbent cotton to succinyl chloride is 10:0.6) solution (the solvent is carbon tetrachloride), and ultrasonically react at 50°C at a frequency of 20KHz for 15 minutes, take out the absorbent cotton, rinse it with deionized water until the rinse solution is neutral, and dry it at 50°C to constant weight to obtain acylated cotton; then, soak the acylated cotton in 1-hexyl-3-methylimidazole chloride (CAS: 171058-17-6, the mixing ratio of acylated cotton to 1-hexyl-3-methylimidazole chloride is 1g:0.07mol l) After being immersed in an ionic solution (the solvent is deionized water), ultrasonic reaction is performed at 40°C at 20KHz for 15 minutes, and then the ultrasound is stopped and kept warm for 2 hours. The acylated cotton is taken out and rinsed with deionized water until it becomes neutral, and then dried at 50°C to constant weight to obtain active cotton;

[0087] S4, immersing the active cotton in a 5% tea polyphenol (CAS: 84650-60-2, the mass ratio of active cotton to tea polyphenol is 1:4) solution (the solute is deionized water), stirring and reacting at 40°C for 4 hours, squeezing out the excess tea polyphenol solution, and drying at 35°C to constant weight to obtain primary modified cotton;

[0088] S5, immersing the primary modified cotton in a silver nitrate aqueous solution (silver ion concentration 0.4 mol / L), introducing nitrogen into the silver nitrate aqueous solution at a rate of 1 L / min for 1-2 h at 35° C., taking out the primary modified cotton and drying it at 65° C. to constant weight to obtain modified absorbent cotton;

[0089] S6. Cut and shape the modified absorbent cotton to obtain a medical absorbent cotton pants-shaped medical pad.

[0090] Example 3

[0091] This Example 3 provides a method for preparing a medical absorbent cotton pants-type medical pad based on the absorbent cotton prepared in Preparation Example 1, comprising the following steps:

[0092] S3. After soaking the absorbent cotton in a 75% ethanol solution for adsorption, soak the pre-wetted absorbent cotton in a 3% mass fraction succinyl chloride (CAS: 543-20-4, the mass ratio of absorbent cotton to succinyl chloride is 10:0.6) solution (the solvent is carbon tetrachloride), and ultrasonically react at 50°C at a frequency of 20KHz for 15 minutes, take out the absorbent cotton, rinse it with deionized water until the rinse solution is neutral, and dry it at 50°C to constant weight to obtain acylated cotton; then, soak the acylated cotton in 1-ethyl-3-methylimidazole chloride (CAS: 65039-09-0, the mixing ratio of acylated cotton to 1-ethyl-3-methylimidazole chloride is 1g:0.07mol l) After being immersed in an ionic solution (the solvent is deionized water), ultrasonic reaction is performed at 40°C at 20KHz for 15 minutes, and then the ultrasound is stopped and kept warm for 2 hours. The acylated cotton is taken out and rinsed with deionized water until it becomes neutral, and then dried at 50°C to constant weight to obtain active cotton;

[0093] S4, immersing the active cotton in a 5% by mass curcumin (CAS: 458-37-7, the mass ratio of active cotton to curcumin is 1:4) solution (the solute is deionized water), stirring and reacting at 40°C for 4 hours, squeezing out the excess tea polyphenols solution, and drying at 35°C to constant weight to obtain primary modified cotton;

[0094] S5, immersing the primary modified cotton in a silver nitrate aqueous solution (silver ion concentration 0.4 mol / L), introducing nitrogen into the silver nitrate aqueous solution at a rate of 1 L / min for 1-2 h at 35° C., taking out the primary modified cotton and drying it at 65° C. to constant weight to obtain modified absorbent cotton;

[0095] S6. Cut and shape the modified absorbent cotton to obtain a medical absorbent cotton pants-shaped medical pad.

[0096] Comparative Example 1

[0097] This comparative example 1 provides a method for preparing a medical absorbent cotton pants-type medical pad based on the absorbent cotton prepared in Preparation Example 1, comprising the following steps:

[0098] S3. After soaking the absorbent cotton in a 75% ethanol solution for adsorption, soak the pre-wetted absorbent cotton in a 3% succinyl chloride (CAS: 543-20-4, the mass ratio of absorbent cotton to succinyl chloride is 10:0.6) solution (the solvent is carbon tetrachloride), and ultrasonically react at 50°C at a frequency of 20KHz for 15 minutes, take out the absorbent cotton, rinse it with deionized water until the rinse solution is neutral, and dry it at 50°C to constant weight to obtain active cotton;

[0099] S4, immersing the active cotton in a 5% tea polyphenol (CAS: 84650-60-2, the mass ratio of active cotton to tea polyphenol is 1:4) solution (the solute is deionized water), stirring and reacting at 40°C for 4 hours, squeezing out the excess tea polyphenol solution, and drying at 35°C to constant weight to obtain primary modified cotton;

[0100] S5, immersing the primary modified cotton in a silver nitrate aqueous solution (silver ion concentration 0.4 mol / L), introducing nitrogen into the silver nitrate aqueous solution at a rate of 1 L / min for 1-2 h at 35° C., taking out the primary modified cotton and drying it at 65° C. to constant weight to obtain modified absorbent cotton;

[0101] S6. Cut and shape the modified absorbent cotton to obtain a medical absorbent cotton pants-shaped medical pad.

[0102] Comparative Example 2

[0103] This comparative example 2 provides a method for preparing a medical absorbent cotton pants-type medical pad based on the absorbent cotton prepared in Preparation Example 1, comprising the following steps:

[0104] S3, after the absorbent cotton is soaked and adsorbed in a 75% ethanol solution, the pre-moistened absorbent cotton is immersed in a 1-ethyl-3-methylimidazolium chloride (CAS: 65039-09-0, the mixing ratio of acylated cotton and 1-ethyl-3-methylimidazolium chloride is 1 g: 0.07 mol) ion solution (the solvent is deionized water), and then ultrasonically reacted at 20 kHz at 40°C for 15 min, then the ultrasound is stopped and kept warm for 2 h, the acylated cotton is taken out and rinsed with deionized water until it is neutral, and then dried at 50°C to constant weight to obtain active cotton;

[0105] S4, immersing the active cotton in a 5% tea polyphenol (CAS: 84650-60-2, the mass ratio of active cotton to tea polyphenol is 1:4) solution (the solute is deionized water), stirring and reacting at 40°C for 4 hours, squeezing out the excess tea polyphenol solution, and drying at 35°C to constant weight to obtain primary modified cotton;

[0106] S5, immersing the primary modified cotton in a silver nitrate aqueous solution (silver ion concentration 0.4 mol / L), introducing nitrogen into the silver nitrate aqueous solution at a rate of 1 L / min for 1-2 h at 35° C., taking out the primary modified cotton and drying it at 65° C. to constant weight to obtain modified absorbent cotton;

[0107] S6. Cut and shape the modified absorbent cotton to obtain a medical absorbent cotton pants-shaped medical pad.

[0108] Comparative Example 3

[0109] This comparative example 3 provides a method for preparing a medical absorbent cotton pants-type medical pad based on the absorbent cotton prepared in Preparation Example 1, comprising the following steps:

[0110] S3, immersing the absorbent cotton in a 5% tea polyphenol (CAS: 84650-60-2, the mass ratio of active cotton to tea polyphenol is 1:4) solution (the solute is deionized water), stirring and reacting at 40°C for 4 hours, squeezing out the excess tea polyphenol solution, and drying at 35°C to constant weight to obtain primary modified cotton;

[0111] S4, immersing the primary modified cotton in a silver nitrate aqueous solution (silver ion concentration 0.4 mol / L), introducing nitrogen into the silver nitrate aqueous solution at a rate of 1 L / min for 1-2 h at 35° C., taking out the primary modified cotton and drying it at 65° C. to constant weight to obtain modified absorbent cotton;

[0112] S6. Cut and shape the modified absorbent cotton to obtain a medical absorbent cotton pants-shaped medical pad.

[0113] Comparative Example 4

[0114] This comparative example 4 provides a method for preparing a medical absorbent cotton pants-type medical pad based on the absorbent cotton prepared in Preparation Example 1, comprising the following steps:

[0115] S3. After soaking the absorbent cotton in a 75% ethanol solution for adsorption, soak the pre-wetted absorbent cotton in a 3% mass fraction succinyl chloride (CAS: 543-20-4, the mass ratio of absorbent cotton to succinyl chloride is 10:0.6) solution (the solvent is carbon tetrachloride), and ultrasonically react at 50°C at a frequency of 20KHz for 15 minutes, take out the absorbent cotton, rinse it with deionized water until the rinse solution is neutral, and dry it at 50°C to constant weight to obtain acylated cotton; then, soak the acylated cotton in 1-ethyl-3-methylimidazole chloride (CAS: 65039-09-0, the mixing ratio of acylated cotton to 1-ethyl-3-methylimidazole chloride is 1g:0.07mol l) After being immersed in an ionic solution (the solvent is deionized water), ultrasonic reaction is performed at 40°C at 20KHz for 15 minutes, and then the ultrasound is stopped and kept warm for 2 hours. The acylated cotton is taken out and rinsed with deionized water until it becomes neutral, and then dried at 50°C to constant weight to obtain active cotton;

[0116] S4, immersing the active cotton in a silver nitrate aqueous solution (silver ion concentration 0.4 mol / L), introducing nitrogen into the silver nitrate aqueous solution at a rate of 1 L / min for 1-2 h at 35° C., taking out the primary modified cotton and drying it at 65° C. to constant weight to obtain modified absorbent cotton;

[0117] S5. Cut and shape the modified absorbent cotton to obtain a medical absorbent cotton pants-shaped medical pad.

[0118] Performance Testing

[0119] The medical absorbent cotton pants-type medical pads prepared in Examples 1 to 3 and Comparative Examples 1 to 4 were tested for the following items:

[0120] Water absorption test: weigh the mass of the medical pad before and after saturated water absorption, and calculate the water absorption rate as shown in Table 1 below. Then use a 100kg weight to press the medical pad for 1 hour to squeeze out the water in the medical pad. Repeat 10 times and measure the 10th water absorption rate. Calculate the water absorption rate decay rate as shown in Table 1;

[0121] Antibacterial test: Based on the method described in Part 3 of GB / T20944.3-2008 "Antibacterial Properties of Textiles", Staphylococcus aureus was selected as the test strain to test the antibacterial properties of the medical pad. The antibacterial rates of the medical pad were measured before water absorption, after saturated water absorption for 5 times, and after saturated water absorption for 10 times, as shown in Table 2 below;

[0122] Water-locking performance test: After the medical pads were saturated with red solution, the water was drained and cotton cloth of the same area as the medical pad was attached to the medical pad. After being evenly compressed with a 10kg weight for 30 minutes, the red area on the surface of the cotton cloth was observed, and the water leakage rate was calculated as the proportion of the red area on the surface of the cotton cloth as shown in Table 2 below. After repeating 10 times, the water leakage rate of the cotton cloth surface for the 10th time was measured as shown in Table 3 below.

[0123] Table 1 Water absorption performance test results

[0124]

[0125]

[0126] Table 2 Antibacterial performance test results

[0127] Antibacterial rate / % 5 times antibacterial rate / % 10 times antibacterial rate / % Example 1 99.86 99.12 98.64 Example 2 99.72 98.91 98.58 Example 3 99.81 99.08 98.71 Comparative Example 1 98.79 87.12 71.62 Comparative Example 2 98.94 88.49 75.49 Comparative Example 3 97.86 75.46 42.67 Comparative Example 4 96.24 92.53 87.61

[0128] Table 3 Water leakage rate detection results

[0129]

[0130]

[0131] Although the embodiments of the present invention are described in detail above, it is obvious to those skilled in the art that various modifications and variations can be made to these embodiments. However, it should be understood that such modifications and variations are within the scope and spirit of the present invention as described in the claims. Moreover, the present invention described herein may have other embodiments and may be implemented or realized in a variety of ways.

Claims

1. A method for preparing a medical absorbent cotton pants-type medical pad, characterized in that: The following steps are involved: The cotton fibers after impurities removal are carded to obtain cotton linters; The cotton linters are degreased in alkali solution and then bleached to obtain absorbent cotton; Activated cotton is prepared by surface activation treatment of absorbent cotton; The active cotton is immersed in a polyphenol solution for adsorption to obtain primary modified cotton; The primary modified cotton is soaked in a silver ion solution, separated and dried to obtain the modified absorbent cotton; The modified absorbent cotton is cut and shaped to obtain a medical absorbent cotton pants-shaped medical pad.

2. The preparation method according to claim 1, characterized in that: The process of surface activation of absorbent cotton to obtain activated cotton includes: Pre-wet the cotton wool in the ethanol solution; The pre-moistened absorbent cotton is reacted in a succinyl chloride solution and then separated and dried to obtain acylated cotton; The acylated cotton is reacted in an ion solution and then separated and dried to obtain the active cotton.

3. The preparation method according to claim 2, characterized in that: The mass fraction of succinyl chloride in the succinyl chloride solution is 1-5%; And / or, the solvent of the succinyl chloride solution includes at least one of carbon tetrachloride, toluene, ethyl acetate, diethyl ether and n-hexane.

4. The preparation method according to claim 2, characterized in that: The mass ratio of the absorbent cotton to the succinyl chloride in the succinyl chloride solution is 10:(0.5-0.8).

5. The preparation method according to claim 2, characterized in that: After the pre-moistened absorbent cotton is immersed in the succinyl chloride solution, ultrasonic reaction is carried out at 40-60°C for 15-20 minutes.

6. The preparation method according to claim 2, characterized in that: The absorbent cotton after the reaction is taken out and washed with deionized water until the washing liquid is neutral, and then dried at 50-60° C. to obtain the acylated cotton.

7. The preparation method according to claim 1, characterized in that: The process of separating and drying acylated cotton after reacting it with an ionic solution to obtain active cotton includes: The solute in the ionic solution includes at least one of 1-ethyl-3-methylimidazolium chloride, 1-hexyl-3-methylimidazolium chloride, 1-octyl-3-methylimidazolium chloride, 1-butyl-3-methylimidazolium chloride, and 1-benzyl-3-methylimidazolium chloride; and / or, the molar concentration of the solute in the ionic solution is 0.1-1 mol / L; and / or, the mixing ratio of the mass of the acylated cotton to the amount of the solute substance in the ionic solution is 1: (0.05-0.06) g / mol; and / or, immersing the acylated cotton in the ionic solution, subjecting it to ultrasonic reaction at 30-50° C. for 10-15 min and then keeping it warm for 1-2 h; And / or, the acylated cotton after the reaction is taken out and washed with deionized water until the washing liquid is neutral, and then dried at 50-60° C. to obtain the active cotton.

8. The preparation method according to claim 1, characterized in that: The process of immersing active cotton in a polyphenol solution for adsorption to obtain primary modified cotton includes: The solute in the polyphenol solution includes at least one of tea polyphenols, anthocyanins, curcumin, resveratrol, and quercetin; and / or, the mass fraction of the solute in the polyphenol solution is 1-10%; and / or, the mass ratio of the active cotton to the solute in the polyphenol solution is 1:(3-5); and / or, immersing the active cotton in a polyphenol solution, stirring and reacting at 30-50° C. for 3-5 hours; And / or, the active cotton after adsorption is taken out, squeezed and dried at 30-40° C. to obtain primary modified cotton.

9. The preparation method according to claim 1, characterized in that: The process of soaking primary modified cotton in a silver ion solution and then separating and drying to obtain modified absorbent cotton includes: The solute of the silver ion solution includes silver nitrate; And / or, the molar concentration of the solute in the silver ion solution is 0.1-0.5 mol / L; and / or, after soaking the primary modified cotton in a silver ion solution, nitrogen is introduced into the silver ion solution at a rate of 1 L / min for 1-2 h at 30-40° C.; And / or, the primary modified cotton after the soaking reaction is taken out and dried at 60-70° C. to obtain modified absorbent cotton.

10. The preparation method according to claim 1, characterized in that: The process of degreasing cotton linters in alkali solution and then bleaching them to make absorbent cotton includes: At 50-80°C, stir the cotton linters in an alkaline solution for 0.5-2h to degrease; And / or, the alkali solution includes at least one of a sodium hydroxide solution and a potassium hydroxide solution; And / or, the mass fraction of the solute in the alkali solution is 5-10%; and / or, washing the degreased cotton linters with deionized water until the washing liquid is neutral; And / or, the degreased cotton linters are immersed in a bleaching solution for bleaching to obtain degreased cotton, and the bleaching solution includes at least one of hydrogen peroxide and sodium hypochlorite.

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